A chemistry student weighs out 0.181 grams of ascorbic acid (H2C6H6O6), a diprotic acid, into a 250. milliliter volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1600 moles/liter NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point.